Imagine if you are Eywa. What kind of creature would you evolve? Would it be bioluminescent? Would it fly? Would it be a herbivore or carnivore? What part of Pandora would it live in? Would it be camouflaged? What shape body would it have? Anything is possible!
My creature would be like a flying Titanothere. It would have loads of body armour, enough to tackle Toruk! It would fly above Iknimaya, feeding on the Ikran below.